World's largest fossil bed linked to ancient climate change.

http://www.insidebayarea.com/dailyreview/localnews/ci_12562210
Hundreds of millions of fossilized shark teeth are buried in the Sharktooth Hill Bone Bed near Bakersfield, Calif., as sharks shed teeth throughout their lives. A few are even as large as this one, shown, from an extinct 40-foot-long shark. A new study from UC Berkeley links rising sea levels more than 15 million years ago to the creation of the renowned bone bed near Bakersfield, the largest accumulation of marine vertebrate in the fossil record worldwide. (Nick Pyenson/University of British Columbia)